Numbery Card Trick - Numberphile

Can Matt implant numbers into Brady's brain - or more likely, is this just a simple card trick? Keep watching to the end!
More links & stuff in full description below ↓↓↓
Featuring Matt Parker - standupmaths.com/
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[@numberphile]

Hey guys - do you like card trick videos with a bit of maths? Do you want more? Thumbs up so I know whether to shoot more! - Brady

[@ashishkumaro]

Yes please make more videos Love 27 card trick

[@KingIsulgard]

Lol, it really feels like he doesn't want to reveal his secrets. :P

[@Qermaq]

If they pick an irrational number, punch them and take their money.

[@remavas5470]

And whats about complex numbers?

[@Bastardatore]

Then you use 2 decks

[@michalnemecek3575]

Brock Harrison on Twitch what if one of the numbers is the square root of i?

[@GeodesicBruh]

Michal Nemecek sqrt i is just a complex number

[@M4RC90]

@@GeodesicBruh well actually it's two numbers :P

[@piguy314159]

Here's my slight variation on this trick: If N1 < N2, put the second "fail" card on the bottom before counting the difference. If N1 > N2, put the whole second pile underneath as Matt did. That way you can be consistent with how you count the cards (always turn over the Nth card, instead of counting N and then turning over the next card).

[@matrikomatriko]

+piguy314159 I have tested this and can confirm, this is true and makes it look smoother.

[@sarthakmohanty997]

I'm sorry I didn't understand. Will you please explain a bit more clearly?

[@piguy314159]

Sarthak Mohanty When he turns over the "wrong" card the second time, he can slide that card underneath while putting the rest of the cards back on top. Then the prediction card ends up at the 3rd (or whatever) position and he can simply turn over the 3rd card instead of counting to 3 and then turning over the next card. That way he can count the other piles in the same manner (just turn over the last card), so he never has to change how he counts the last pile and risk someone noticing.

[@sarthakmohanty997]

Thanks

[@Russeljrjs]

"and then their brain blows up" 😂😂😂😂

[@mismag822]

Do more! Maths or Math FTW

[@Jaojao_puzzlesolver]

1:31 How to fold up a paper *properly* 😆

[@shantanunene4389]

In the first attempt, I thought it turned out to be a Parker square trick.

[@narutostelwolf]

I've never seen someone so enthusiastic about magic.

[@aaronleperspicace1704]

3:40 😂😂😂 This is meme material!

[@magma_chicken9993]

I like how he was like 'Hey! You're still here! What more do you want?"

[@Fredediah]

I'm really excited about the Rubik's cube videos! I've always been fascinated by those things, and any discussion about them from you guys on Numberphile is guaranteed to be amazing, and probably even mind-blowing.

[@br0sRchill]

"Really? Im glad you're certain because it is the top card!" "and then their brain blows up"

[@michaeln.1981]

"no youtubery"

[@samuelhodges6471]

Nice. Covered all of the possibilities. I like the MIT (Magician In Trouble), syndrome. This effect is a great follow up after an ACAAN (Any Card At Any Number), effect where the effect is carried one step further (if it ever comes up that the spectator is sceptic of the first effect ), by allowing the spectator to pick the number where the card should be in a sense that you sent the number to the spectator, yet leaving the spectator with the thought that the spectator really received the number that you sent or the spectator could have picked any number that popped in their head. This is perfect when the spectator is sceptic that the performer is really not sending the number to them mentally and the spectator just say any number to see if the trick will work. So, when the effect still works, in that case, this makes the effect all the more powerful!

[@RomanNumural9]

What if they pick a complex number?

[@leonenaj]

+Josh McGillivray then you let THEM count out 1 + 1i cards from the deck

[@SharayaYT]

You let them imagine the card.

[@colonelstriker2519]

Punch them

[@elnico5623]

You say it got lost in their *imagination*

[@JackFlashTech]

Count out the real part and then rotate the deck the imaginary part.

[@numberphile]

great - thank you! more like this one are coming!

[@kevin9794]

You should do more videos with Matt. He's pretty cool and funny!

[@alansmithee419]

Loving the adjective "numbery"

[@malosmys7660]

What if they say 5 and 10 or any other pair that one is twice the other? Then the difference would be one that they already guessed and the reveal wouldn't work.

[@Vixikats]

This is a mechanic that can easily be added onto to involve audience members picking the card. Add a little sleight of hand into the equation and you can really make a brain-teasing trick that's guaranteed to baffle people. Not many magicians actually mix sleuth tricks with math tricks, but when it's done well, it's really good.

[@DenisRyan]

Great video! Bu I especially love the list of Brady's channels in the description! I've been missing out on a few, but not anymore! How long have you been doing this?

[@mismag822]

Brady, it looks like people want more MATHS CARD TRICKS :)

[@eralipe]

I really enjoy your videos!

[@FyirexShinObi]

3:40 LOL

[@ReinoudvanZoelen]

the end was amazing

[@Genet1xProductions]

AGH I almost thought the video was gonna end at 4:30! Thanx for another awesome video Brady :D and Matt for the cool trick.

[@barts185]

Much simpler, easier and more effective as a trick (IMO of course) - first, tell them to pick a number between 5 and 20 so you're not counting cards all day long. You count down and show whatever number card they said. After you get it wrong, put the cards back on the deck, and then act like you just realized that since THEY came up with the number THEY should do it. Hand them back the deck, they count down the same number, and quicker than you can say Spiriti mei infernali, obedite, it works.

[@Mormodes]

Yes! love learning magic tricks like this.

[@jekrixlokan4507]

That's the most parker way of folding a paper

[@MattPieti]

That guy's my favorite out of all the guys in numberphile videos. I'll always remember the video where he suggests he is going to start writing on a blackboard and pulls it away to reveal more brown paper.

[@nVinter]

This guy is just amazing.

[@TazManiac008]

I did the trick to a friend, his first choice was 1, I showed him the card and he was blown away!!

[@numberphile]

we're doing a bunch of Rubik's videos but they are not quite finished yet...

[@TobyLerone]

I was actually thinking twelve!!

[@Morgan4320914]

i love this channel!

[@AdultsSwim1]

Lol the still face at the end of the video is classic

[@Izandaia]

I love his face in the last frame.

[@JaihindhReddy]

When he said that we have to write down the top card, I immediately understood the trick. And it is so simple!!!

[@darkminer14]

that was awesome!

[@wewwjon]

this is the sickest trick ever! i've got to use it on my friends that always do card tricks on me!

[@blipmachine]

9:37 is a meme waiting to be discovered.

[@presto709]

Don't do the failing twice thing. Just ask for a number, deal, ask for another number, deal, then show that they found the card. Failing twice makes it looks like you are just going to keep going until you finally reach their card

[@JeffChilds]

Brilliant.

[@guardianpax]

Oh a teaser! I can't wait. Keep up the good work.

[@DejanMaticnaLSDu]

I hated math my whole life, I can't stand one day of my life whit out numberphile since I have discovered it. Thank you numberphile for showing me the beauty of math!

[@Tanguero1]

When a person chooses a smaller number second (e.g., 7 followed by 5) you do not need to change the trick and present the 5 card. Simply ask them to choose the second number, in this case 5 and place the 8th card on top of the pile you just counted out instead of placing in back on the the main card pile. Proceed with placing the "counted" pile underneath the main pile and count out 2 in this example and the 3rd card will be the card you wrote down.

[@shubhankardalai618]

Z

[@bdoe712]

I love this trick!

[@numberphile]

about four years I think (on KZbin)

[@barts185]

Two things to correct: First - there's 52 factorial ways that a deck can be shuffled. So as opposed to 52 squared, which would be 2704 ways to shuffle a deck, there's actually 80,658,175,170,943,878,571,660,636,856,403,766,975,289,505,440,883,277,824,000,000,000,000 ways a deck of cards can be shuffled. And even with all those ways to shuffle a deck of cards, there's only 52 spots a particular card can go in, so the 8 of diamonds will be in slot 1 (on top) once out of every 52 times.

[@friesotje]

That end was genius.

[@alexsimi66]

I found out on the Internet a very complicated math card trick that works every time and I have no idea how it works, it requires no preparation, no peeking at a card, not a single cheat. Can I make a video and reply to this video showing the trick? It's really impressive!

[@WhimsicottFanatic]

I always forget how KZbin comments didn't always have sub-threads for direct replies until I watch videos that are like 6, 7 years or older and see comments [usually from the uploader] that are seemingly nonsensical and talking to nobody, when in reality they are actually in response to another comment and replies just used to be their own comments Really makes me appreciate the current comment system, honestly. But remembering the old system reminded me of the spot above the comments where folks could "submit" [for lack of a better word] a video to be there as a related/response video [I don't remember specifically what the term was, if there's anyone who's as much of a fossil as I am who's actually understanding what I'm talking about, let me know] with the uploader's approval

[@WhimsicottFanatic]

Like maybe an actual explanation of that system would help: Take this video for example, imagine if a viewer, after watching this video, decided to make a video of them doing this trick on a friend Said viewer could then "submit" [again, for lack of a better word] their video to Numberphile, and if Numberphile approved it, then the viewer's video would always be in a specific section above the comments, different from the actual, KZbin-picked recommended/related That was probably still explained bad, but I swear this existed, I remember it being used for collab videos and whatnot

[@MSL444]

More of these kind of videos ! Nce one guys !

[@modestas62]

But the fact that you look at all the cards at the start puts the "magic" of this trick way back.

[@LuisBrudna]

Perfect!!

[@hideyoshikinoshita1266]

there's a thing called card force in magic trick, and one of those card force work kinda similar to this one except it do with 1 number and it repeat twice instead of 2 diff number then subtract the 2. But both work on the same idea of reverse cards order.

[@ragnkja]

A bunch of them? It seems I have a lot to look forwards to! :D

[@trixter21992251]

my brain when they pick a negative number and insist I count from the bottom

[@naruto4100]

that was the best thing ive ever seen as a comment reply

[@IsaacarWolfsbane]

I was slightly terrified because Brady said both of the numbers I was thinking of.

[@tomcatuk]

Of course I'm still watching!

[@IcEye89]

What we are able to see here is a true master of origami anyone can fold paper to make a swan, a dragon or a working model of Stephenson's Rocket but it takes years of practise to perfect the one handed blob of paper and even more so if you perform it on camera.

[@NebulousPendulum]

I had a deck of cards and was doing this with him. I was shuffling the cards as he was explaining what to do if they pick 1 or 0, and i flipped over the top card at the exact same time as he did. It was the 8 of diamonds. My brain blew up.

[@michaelsports8970]

When asked to pick a number between 1 and 10 or some larger number, I always go with 2π

[@Movementxx]

Hahaha his face at the end:D

[@gsusfrq]

Me too! D: I want to see that video!

[@maplelegend1]

I love one of your tricks where the final 3 cards remaining are the spectator's cards.

[@buschtoens]

7:03 Love that phrase! :D

[@guardianpax]

Brady, the end of this video shows a Rubik's cube video, but doesn't link directly to that video. I can't find it! Which one of them is that video?

[@thanksfordoxingpeopleyoutube]

what would you do if they double the first number to get the second e.g 12 as first and then 24 as second. the difference is equall to a number allready said and will show the the order has changed

[@mismag822]

Some of the related videos are pretty cool ;)

[@MrMollusk7]

The magic in magic doesn't lie in fully in the mystery. While it does play a major part in small tricks, everyone knows there's no such thing as magic, and even if you know how the trick's done, you can still be impressed by the execution of the trick. This is why Penn and Teller are amazing and Criss Angel is terrible.

[@Dyslexic-Artist-Theory-on-Time]

Interesting video! This is an invitation to see an artist theory on the physics of light and time! This theory is based on just two postulates 1. Is that the quantum wave particle function Ψ or probability function represents the forward passage of time itself 2. Is that Heisenberg’s Uncertainty Principle ∆×∆p×≥h/4π that is formed by the w-function is the same uncertainty we have with any future event within our own ref-frame that we can interact with turning the possible into the actual!

[@sheeskhalid3938]

Wow, the outro expressions😂

[@tsjoencinema]

Nice trick! :)

[@TheCleverJon]

That face at 9:38 must be the most hilarius face i have ever seen.

[@SomeoneWelsh]

that is an amazing trick. how did you do it. wow

[@VenetinOfficial]

i laughed at the face at the end XD

[@RandomGuy1606]

My favourite mind blown maths card trick.... If i pre-arrange a deck so that the colour of the suit alternates between black and red the whole way through. If i perform a single "riffle shuffle" on the deck, what is the probability that each pair i draw from the top of the deck will contain one black card and one red card? HINT the answer is 1 :) every pair will consist of 1 black and red card even though the deck has been shuffled.

[@DavidWhiteOfFleet]

KZbin subtitles had you saying "math card trick". I had to check. Thankfully KZbin got it wrong.

[@browneye1968]

I'm still watching in 2019

[@Ramotick]

LOL The ending

[@judemichael9158]

you are awesome

[@IceMetalPunk]

Makes searching for Numberphile videos easier.

[@L00NGB00W]

Then the second rule would apply. The 8 ♦ would become the 52nd card. So you ask for another number..... say 12. Then you place the stack of 12 on the bottom of the deck. The difference is 40. And 8♦ will be the 40th card. ;)

[@oexnorth]

Brady Have you seen this trick? With the same deck, count half of them out face up and remember the 7th card. Pick this half up and put on the bottom of the deck that you didn't count out. Take the first card off the top and lay it down face up. If it's a 2-9, count out cards one by one face down to reach 10. If it is anything else, that card has a value of ten and no need to count out more. Add up the 3 cards facing up and count that out on the remaining deck. The last card will be the 7th.

[@MagiCorium]

"And then their brain blows up" glad I watched it to the end

[@chuchi820]

i luved the way he folded tht paper xD

[@adnh311]

waiting for it soooo badlyyyy XD (so I can post it on tons of cubing forums :D)

[@Strife159Highloch]

He said twelve the same time I did. Sacred the shit out of me.

[@XempireX18]

"and then their brain blows up." hahahaha, u r just too funny.

[@quinnencrawford9707]

Oh man, I wanna make a computer from playing cards. I don't know how, though.

[@elnico5623]

Im almost certain that you can.... somehow

[@MrComaToes]

The BETTER option would be to have them give you a number (12, lets say) count them out "oh, that's not the card, let me try that again, I may have miscounted" "You said the 12th card, right?" Count them again and voila, it's the 12th card.

[@Swordfishstick]

You could say something like - "you know... I can't believe it didn't work the first time, maybe I just counted wrong - let's try the 10 again". :)

[@melf9272]

That's really neat folding

[@Edawan00]

"... and then brain blows up" and then you have to clean up that mess and try to explain yourself to the police.

[@ItsSansom]

6:26 He looks like he's at a bar xD

[@jamesb383]

Did anyone else pause the video and choose their own numbers and get the same numbers as the guy in the video? I was freaking out!!!

[@MrFloRolf]

sure it does. The card is the second one, after the first guess, and then he says one so the first card (at first second card) comes of and the one after that is the card you chose.